<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <title>Binds variables to a prepared statement for result storage</title>
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-base.css" />
<link media="all" rel="stylesheet" type="text/css" href="styles/03e73060321a0a848018724a6c83de7f-theme-medium.css" />

 </head>
 <body class="docs"><div class="navbar navbar-fixed-top">
  <div class="navbar-inner clearfix">
    <ul class="nav" style="width: 100%">
      <li style="float: left;"><a href="mysqli-stmt.bind-param.html">« mysqli_stmt::bind_param</a></li>
      <li style="float: right;"><a href="mysqli-stmt.close.html">mysqli_stmt::close »</a></li>
    </ul>
  </div>
</div>
<div id="breadcrumbs" class="clearfix">
  <ul class="breadcrumbs-container">
    <li><a href="index.html">PHP Manual</a></li>
    <li><a href="class.mysqli-stmt.html">MySQLi_STMT</a></li>
    <li>Binds variables to a prepared statement for result storage</li>
  </ul>
</div>
<div id="layout">
  <div id="layout-content"><div id="mysqli-stmt.bind-result" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">mysqli_stmt::bind_result</h1>
  <h1 class="refname">mysqli_stmt_bind_result</h1>
  <p class="verinfo">(PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">mysqli_stmt::bind_result</span> -- <span class="refname">mysqli_stmt_bind_result</span> &mdash; <span class="dc-title">Binds variables to a prepared statement for result storage</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-mysqli-stmt.bind-result-description">
  <h3 class="title">说明</h3>
  <p class="para">面向对象风格</p>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>mysqli_stmt::bind_result</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$var</code></span>, <span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&...$vars</code></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">过程化风格</p>
  <div class="methodsynopsis dc-description"><span class="methodname"><strong>mysqli_stmt_bind_result</strong></span>(<span class="methodparam"><span class="type"><a href="class.mysqli-stmt.html" class="type mysqli_stmt">mysqli_stmt</a></span> <code class="parameter">$statement</code></span>, <span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&$var</code></span>, <span class="methodparam"><span class="type"><a href="language.types.declarations.html#language.types.declarations.mixed" class="type mixed">mixed</a></span> <code class="parameter reference">&...$vars</code></span>): <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   Binds columns in the result set to variables.
  </p>
  <p class="para">
   When <span class="function"><a href="mysqli-stmt.fetch.html" class="function">mysqli_stmt_fetch()</a></span> is called to fetch data, the
   MySQL client/server protocol places the data for the bound columns into
   the specified variables <code class="parameter">var</code>/<code class="parameter">vars</code>.
  </p>
  <p class="para">
   A column can be bound or rebound at any time, even after a result set has
   been partially retrieved. The new binding takes effect the next time 
   <span class="function"><a href="mysqli-stmt.fetch.html" class="function">mysqli_stmt_fetch()</a></span> is called.
  </p>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    All columns must be bound after 
    <span class="function"><a href="mysqli-stmt.execute.html" class="function">mysqli_stmt_execute()</a></span> and prior to calling
    <span class="function"><a href="mysqli-stmt.fetch.html" class="function">mysqli_stmt_fetch()</a></span>.
   </p>
  </p></blockquote>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    Depending on column types bound variables can silently change to the
    corresponding PHP type.
   </p>
  </p></blockquote>
  <div class="tip"><strong class="tip">小技巧</strong>
   <p class="para">
    This functions is useful for simple results. To retrieve iterable result
    set, or fetch each row as an array or object,
    use <span class="function"><a href="mysqli-stmt.get-result.html" class="function">mysqli_stmt_get_result()</a></span>.
   </p>
  </div>
 </div>


 <div class="refsect1 parameters" id="refsect1-mysqli-stmt.bind-result-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    <dt>

<code class="parameter">statement</code></dt>
<dd>
<p class="para">仅以过程化样式：由
<span class="function"><a href="mysqli.stmt-init.html" class="function">mysqli_stmt_init()</a></span> 返回的 <span class="classname"><a href="class.mysqli-stmt.html" class="classname">mysqli_stmt</a></span> 对象。</p></dd>

    
     <dt>
<code class="parameter">var</code></dt>

     <dd>

      <p class="para">
       The first variable to be bound.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">vars</code></dt>

     <dd>

      <p class="para">
       Further variables to be bound.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-mysqli-stmt.bind-result-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-mysqli-stmt.bind-result-examples">
  <h3 class="title">范例</h3>
  <div class="example" id="example-1485">
   <p><strong>示例 #1 面向对象风格</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />mysqli_report</span><span style="color: #007700">(</span><span style="color: #0000BB">MYSQLI_REPORT_ERROR&nbsp;</span><span style="color: #007700">|&nbsp;</span><span style="color: #0000BB">MYSQLI_REPORT_STRICT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$mysqli&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">mysqli</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"my_user"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"my_password"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"world"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;prepare&nbsp;statement&nbsp;*/<br /></span><span style="color: #0000BB">$stmt&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$mysqli</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT&nbsp;Code,&nbsp;Name&nbsp;FROM&nbsp;Country&nbsp;ORDER&nbsp;BY&nbsp;Name&nbsp;LIMIT&nbsp;5"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/*&nbsp;bind&nbsp;variables&nbsp;to&nbsp;prepared&nbsp;statement&nbsp;*/<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">bind_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$col1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col2</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;fetch&nbsp;values&nbsp;*/<br /></span><span style="color: #007700">while&nbsp;(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">fetch</span><span style="color: #007700">())&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col2</span><span style="color: #007700">);<br />}</span>
</span>
</code></div>
   </div>

  </div>
  <div class="example" id="example-1486">
   <p><strong>示例 #2 过程化风格</strong></p>
   <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />mysqli_report</span><span style="color: #007700">(</span><span style="color: #0000BB">MYSQLI_REPORT_ERROR&nbsp;</span><span style="color: #007700">|&nbsp;</span><span style="color: #0000BB">MYSQLI_REPORT_STRICT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$link&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mysqli_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"my_user"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"my_password"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"world"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;prepare&nbsp;statement&nbsp;*/<br /></span><span style="color: #0000BB">$stmt&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">mysqli_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"SELECT&nbsp;Code,&nbsp;Name&nbsp;FROM&nbsp;Country&nbsp;ORDER&nbsp;BY&nbsp;Name&nbsp;LIMIT&nbsp;5"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mysqli_stmt_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;bind&nbsp;variables&nbsp;to&nbsp;prepared&nbsp;statement&nbsp;*/<br /></span><span style="color: #0000BB">mysqli_stmt_bind_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col2</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*&nbsp;fetch&nbsp;values&nbsp;*/<br /></span><span style="color: #007700">while&nbsp;(</span><span style="color: #0000BB">mysqli_stmt_fetch</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s&nbsp;%s\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$col2</span><span style="color: #007700">);<br />}</span>
</span>
</code></div>
   </div>

   <div class="example-contents"><p>以上例程的输出类似于：</p></div>
   <div class="example-contents screen">
<div class="cdata"><pre>
AFG Afghanistan
ALB Albania
DZA Algeria
ASM American Samoa
AND Andorra
</pre></div>
   </div>
  </div>
 </div>


 <div class="refsect1 seealso" id="refsect1-mysqli-stmt.bind-result-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="mysqli-stmt.get-result.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_get_result()</a> - Gets a result set from a prepared statement as a mysqli_result object</span></li>
    <li class="member"><span class="function"><a href="mysqli-stmt.bind-param.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_bind_param()</a> - Binds variables to a prepared statement as parameters</span></li>
    <li class="member"><span class="function"><a href="mysqli-stmt.execute.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_execute()</a> - Executes a prepared statement</span></li>
    <li class="member"><span class="function"><a href="mysqli-stmt.fetch.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_fetch()</a> - Fetch results from a prepared statement into the bound variables</span></li>
    <li class="member"><span class="function"><a href="mysqli.prepare.html" class="function" rel="rdfs-seeAlso">mysqli_prepare()</a> - 准备执行一个 SQL 语句</span></li>
    <li class="member"><span class="function"><a href="mysqli-stmt.prepare.html" class="function" rel="rdfs-seeAlso">mysqli_stmt_prepare()</a> - Prepares an SQL statement for execution</span></li>
   </ul>
  </p>
 </div>


</div></div></div></body></html>